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Can a really inefficient 500W PSU take a 7850 OC/7870/270x/7950/GTX660? - Page 3

post #21 of 26
please get another PSU ASAP.
Quote:
Originally Posted by sherlock View Post

Quote:
Originally Posted by smnzer View Post

Quick specs for reference:

i5 3470 Stock (OC not worth it)
1 stick DDR3 8GB
1 140mm fan + CPU cooler
GA-B75M-D2V Mobo
1 SATA 3 HDD 1TB

It all depend on the maximum load you can put on the 12Volt Rail(all CPU & GPU power consumption come from this rail), check how much your PSU can supply on the 12V rail(should be present on either the manual or the product sheet.
and then look for the maximum GPU power consumption+77W(for the i5 3470), if the 12V value is substantially higher than this GPU+CPU consumption value then you should be fine.
Warning: Spoiler! (Click to show)
Consult this list on techpowerup.com for GPU power consumption

Looking at this review of that PSU



Even though each of it s 12V rail(CPU & GPU are on separate rails) are claimed to pull 12V*18A=216W each, So with a 77W CPU and a 144W GPU (7950 without OC) you should be fine without OC, but you should consider get a better PSU eventually.

no offense but you missed a few things; a stick of RAM uses ~8 watts, fans ~5 watts, HD ~8 watts and the motherboard chipset for sandy/ivy another ~8 watts. so you're missing ~34 watts for 111 watts in system power off the 12 volt rail.

also that 18 amps for each of the 12 volt rails are what the OCP is supposedly set at individually. if you look at that image a little closer you will see the combined power is 360 watts or 360/12= 30amps/2= 15 amps each on a load. take a look even closer and you'll see "The +3.3v,+ 5v, +12v1 and +12v2 is to not exceed 431 watts."

that is NOT a 500 watt PSU.

edit:
forgot some math tongue.gif
Edited by looniam - 11/24/13 at 1:50pm
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post #22 of 26
Thank god that the new Cooler Master units are nothing like the old ones like this one

The Cooler Master V550S beats the Rosewill Capstone the Seasonic G and the Corsair RM in the gold rated mid price range
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post #23 of 26
Thread Starter 
Quote:
Originally Posted by shilka View Post

Thank god that the new Cooler Master units are nothing like the old ones like this one

The Cooler Master V550S beats the Rosewill Capstone the Seasonic G and the Corsair RM in the gold rated mid price range
Any good software that I can use to monitor my PSU temperature and GPU temperature? When should the alarm bells go off?
    
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post #24 of 26
*
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post #25 of 26
Quote:
Originally Posted by looniam View Post

please get another PSU ASAP.
no offense but you missed a few things; a stick of RAM uses ~8 watts, fans ~5 watts, HD ~8 watts and the motherboard chipset for sandy/ivy another ~8 watts. so you're missing ~34 watts for 111 watts in system power off the 12 volt rail.

also that 18 amps for each of the 12 volt rails are what the OCP is supposedly set at individually. if you look at that image a little closer you will see the combined power is 360 watts or 360/12= 30amps/2= 15 amps each on a load. take a look even closer and you'll see "The +3.3v,+ 5v, +12v1 and +12v2 is to not exceed 431 watts."

that is NOT a 500 watt PSU.

edit:
forgot some math

I take offense with your "no-offense", otherwise after a deeper look at the review I agree it is a terrible PSU and should be replaced ASAP(and I originally insisted that he replace that PSU ASAP well, just thought it was usable in a pinch).
Edited by sherlock - 11/24/13 at 6:46pm
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post #26 of 26
Quote:
Originally Posted by smnzer View Post

Any good software that I can use to monitor my PSU temperature and GPU temperature? When should the alarm bells go off?

GPU temperatures can be gotten with just about any of the kind of HWMonitor stuff or the graphics card control software.

You have an eXtreme Power Plus. Alarm bells are already going off. It's your choice if you want to ignore them and keep using it in a system with a reasonable graphics card (it will work, after all) for some period of time.

Don't get that Enermax. The Cooler Master V550S (V450S) is some of the best of what's available without going over 200.
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